any functional anomaly of this amine that is involved in local immune response, in regulating physiological function in the gut, and that acts as a neurotransmitter
abnormal hormone level +
abnormal ion homeostasis +
abnormal lipid homeostasis +
abnormal lipoprotein level +
abnormal mineral homeostasis +
abnormal pH regulation +
abnormal porphyrin level +
abnormal protein level +
abnormal susceptibility to non-insulin-dependent diabetes +